ON Semiconductor MC74ACT646DWR2 Octal Transceiver and Register

The ON Semiconductor MC74ACT646DWR2 is a high-performance, integrated circuit designed to serve as an octal transceiver and register. This device is part of the Advanced CMOS Technology (ACT) family, which combines the high-speed characteristics of bipolar circuits with the power-saving features of CMOS technology, making it ideal for a variety of digital applications.

The MC74ACT646DWR2 features eight bidirectional data lines, which allow for the transmission and reception of data in both directions. This makes it particularly useful in communication systems, data exchange protocols, and bus-oriented applications where data flow control is essential. The transceiver is capable of driving heavily loaded buses with up to 15 LSTTL loads while maintaining fast data transfer rates and low power dissipation.

With a wide operating voltage range of 4.5V to 5.5V, this device ensures compatibility with most 5V systems. The octal bus transceiver also includes a built-in octal D-type flip-flop feature, which gives the user the option to store data in the register or transfer it through the bus, depending on the mode selected. The direction control and output enable inputs control the direction of data flow and enable the outputs, respectively, which provides additional flexibility in system design.

The MC74ACT646DWR2 comes in a surface-mount, 24-pin SOIC package, providing a compact solution that is suitable for space-constrained applications. Its operating temperature range of -40°C to +85°C ensures reliable performance across a wide range of environmental conditions.

ON Semiconductor has designed the MC74ACT646DWR2 with multiple features to enhance its performance and reliability. It includes over-voltage tolerance inputs for system-level ESD protection, bus hold data inputs to eliminate the need for external pull-up resistors, and glitch-free power-up/power-down protection for the bus inputs and outputs.

Whether it's being used in microprocessor or microcomputer-based systems, memory drivers, or as a buffer for bidirectional bus systems, the MC74ACT646DWR2 from ON Semiconductor offers a robust and efficient solution for managing digital data transfer in a variety of electronic applications.